Estimation of channel impulse response with a dynamic number of coefficients

摘要

This application describes a method of estimating the channel impulse response (CIR) in a communication system, using a known training sequence transmitted over the channel. Received symbols are cross-correlated with the training sequence to provide a predetermined number, W, of possible channel coefficients. A maximum number, less than W, is then determined to be used as the estimated CIR. For various possible sets of coefficients within the W coefficients, the mean squared error is calculated between a received signal sequence and a reconstructed sequence using each set of coefficients. The set which produces the minimum mean squared error is selected.